
 function appendHtml(str){

    var museList = `<div class="nav_com">
    <div class="nav_item active_nav" data-index="0"><a class="./index.html">${str}品牌库首页</a></div>
    <div class="nav_item">
      <a class="" data-index="1" href="survey.html">${str}制造业概况</a>
    </div>
    <div class="nav_item" data-index="2">
      <a class="" href="brand.html">${str}制造业品牌库</a>
    </div>
    <div class="nav_item" data-index="3">
      <a class="" href="media.html">${str}制造业机构和媒体</a>
    </div>
    <div class="nav_item" data-index="4">
      <a class="" href="forum.html">${str}制造交流和论坛</a>
    </div>
    </div>`
    return museList
} 